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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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25th May 2017, 12:36 pm | #1 |
Triode
Join Date: Nov 2012
Location: Grimsby, Lincolnshire, UK.
Posts: 11
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2SA950-Y Equivalent
Hi all, I've not been here for a while, new child + radio shack in pieces has caused an imbalance of available time.
Anyway, I am back. I have my dad's old FDK-750A multi 2m transceiver. A transistor has let go the magic wizard smoke. I've identified the part as TR27 and the part is a 2SA950-Y. A PNP Silicon transistor. I've been hunting google for an equivalent part but wading through the random chinese websites and adverts has caused VGA blindness so I thought I'd ask here instead. I have a couple of PNP transistors in the draw of certain bits but the ones I can find a datasheet for are way off. Regards Dave |
25th May 2017, 12:47 pm | #2 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,787
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Re: 2SA950-Y Equivalent
It's a medium power PNP Si transistor and looks very like a BC327 or even a 2N2907. I can't see anything unusual about it so lots of types will probably be OK if the current rating is up to the job, especially if the circuit design isn't pushing the ratings.
If you need something with a bit more grunt there are lots of 2SB772s going cheap on eBay at the moment. http://html.alldatasheet.com/html-pd.../1/2SA950.html |
25th May 2017, 12:48 pm | #3 |
Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,923
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Re: 2SA950-Y Equivalent
£1.78 for 5 on Ebay (2SA950)
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25th May 2017, 4:22 pm | #4 | |
Triode
Join Date: Nov 2012
Location: Grimsby, Lincolnshire, UK.
Posts: 11
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Re: 2SA950-Y Equivalent
Quote:
Last edited by Station X; 25th May 2017 at 6:16 pm. Reason: Forum rule compliance. |
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25th May 2017, 7:29 pm | #5 |
Rest in Peace
Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,944
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Re: 2SA950-Y Equivalent
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25th May 2017, 7:55 pm | #6 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,787
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Re: 2SA950-Y Equivalent
No, it's the gain grouping. Y is the higher gain range, though still under 350. They have the standard Japanese leadout of e-c-b.
If replacing with a 2N2907, remember that the leadout is different, so a bit of knitting will be required |
25th May 2017, 8:21 pm | #7 |
Rest in Peace
Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,944
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Re: 2SA950-Y Equivalent
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25th May 2017, 8:25 pm | #8 |
Triode
Join Date: Nov 2012
Location: Grimsby, Lincolnshire, UK.
Posts: 11
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Re: 2SA950-Y Equivalent
Looks like a trip to the bits shop is in order. All I have in BoB is a 2N3906 and some unused OC83s.
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25th May 2017, 9:19 pm | #9 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,787
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Re: 2SA950-Y Equivalent
A 2N3906 won't be up to the job.
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25th May 2017, 9:19 pm | #10 |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,562
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Re: 2SA950-Y Equivalent
Hi.
The hFE classification taken from a Fairchild data sheet is as follows: O = 90 to 180 Y = 135 to 270 G = 200 to 400 L = 300 to 600 I assume this coding system is universal for Japanese transistors. Regards Symon |
25th May 2017, 9:20 pm | #11 |
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Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,787
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Re: 2SA950-Y Equivalent
It's not universal, but it's widely used.
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25th May 2017, 9:27 pm | #12 |
Triode
Join Date: Nov 2012
Location: Grimsby, Lincolnshire, UK.
Posts: 11
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Re: 2SA950-Y Equivalent
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28th May 2017, 9:32 pm | #13 | |
Heptode
Join Date: Oct 2008
Location: Aalborg, Denmark
Posts: 903
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Re: 2SA950-Y Equivalent
Quote:
If the smoke's out perhaps so for a reason. I would check with an ohm-meter the resistance from Collector of TR27 to ground. If low or even shorted more smoke's on the way. |
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28th May 2017, 9:43 pm | #14 |
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Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,787
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Re: 2SA950-Y Equivalent
I agree, transistors of this type rarely fail in the absence of a more significant fault.
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